and today another of the dead was identified. 29-year-old krystle campbell of medford, massachusetts. >> everybody that knew her loved her. she loved her job. she had a heart of gold. she would always smile. you couldn't ask for a better daughter. i can't believe this has happened. >> reporter: allen panzer, a north carolina emergency room physician, was waiting for his wife to cross the finish line. he saw the explosion and attended to the most seriously wounded. >> it was blast injuries to the lower extremities for the most part. one gentleman had no legs below the knees. >> reporter: investigators say the bombs were placed among the crowd down the block from each other, detonating just over ten seconds apart. officially, it was back to business in most of boston today. but reminders are everywhere that things are not back to normal. >> you see people, and their faces are really sober, just walking around. it's kind of an eerie feeling in the air. >> reporter: today runners were able to return to the route to collect belongings that were left in the haste of yesterday's flee to safe